package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.webSocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.RandomStringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private shoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    @Override
    @Transactional
    public OrderSubmitVO add(OrdersSubmitDTO ordersSubmitDTO) {
        //第一步去检查前端提交的数据 购物车是否为空 地址是否没填 如果是小程序端其实前端已经帮我们检查过了 但是为了代码的健壮性我们还是选择再次校验
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        List<ShoppingCart> cartList = shoppingCartMapper.listByUserId(BaseContext.getCurrentId());
        if(CollectionUtils.isEmpty(cartList)){
            throw new OrderBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表中插入一条数据 在上面的addressBook里面已经封装了对应的地址信息
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        //先去生成订单号用uuid工具类来实现?用现在时间的时间戳来实现  一开始的状态是代付款 并且未支付
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setOrderTime(LocalDateTime.now());
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());
        //我直接把送达时间设置了
        //orders.setDeliveryTime(ordersSubmitDTO.getEstimatedDeliveryTime().minus(5, ChronoUnit.MINUTES));
        //疑问？我订单明细表应该如何更新呢？去购物车表里面查到具体的订单信息加入到order_detail表
        // 并且订单表中有些字段需要通过和地址簿表联查得到 我需要写这一部分逻辑吗？
        orderMapper.add(orders);
        Long id=orders.getId();
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //查购物车然后加入订单明细表中 此时需要一个订单ID
        List<OrderDetail> ans=new ArrayList<>();
        for(ShoppingCart c:cartList){
            OrderDetail orderDetail=OrderDetail.builder()
                    .orderId(id)
                    .name(c.getName()).dishId(c.getDishId())
                    .dishFlavor(c.getDishFlavor())
                    .name(c.getName()).
                    setmealId(c.getSetmealId())
                    .number(c.getNumber())
                    .amount(c.getAmount())
                    .image(c.getImage()).build();
            //插入订单明细表
            ans.add(orderDetail);
        }
        //这样只要访问一次数据库比较高效
        orderDetailMapper.add(ans);
        //清空当前用户的购物车数据 你订单都提交了 那就清空掉啊不然下次来的时候怎么办呢对不对
        shoppingCartMapper.deleteAll(BaseContext.getCurrentId());
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();
    }
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return OrderPaymentVO.builder()
                    .timeStamp(String.valueOf(System.currentTimeMillis() / 1000)) // 单位秒
                    .nonceStr(RandomStringUtils.randomNumeric(32)) // 随机数字串
                    .packageStr("prepay_id=wx88888888888888") // 模拟 prepay_id
                    .signType("RSA") // 微信签名类型
                    .paySign("mock-signature-value") // 模拟签名
                    .build();
    }
    public void paySuccess(String outTradeNo) {
        //当你支付成功的时候 服务器需要通知客户端来单了
        // 根据订单号查询订单
        log.info("查询订单：{}", outTradeNo);
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //通过webSocketServer来向客户端发送消息、
        Map<String,Object> map=new HashMap<>();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号"+outTradeNo);
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
    @Override
    public PageResult search(String page, String pageSize, String status) {
        PageHelper.startPage(Integer.parseInt(page),Integer.parseInt(pageSize));
        Integer x=null;
        if(StringUtils.hasLength(status)){
            x=Integer.parseInt(status);
        }
        Page<Orders> p=(Page<Orders>) orderMapper.search(x,BaseContext.getCurrentId());
        return new PageResult(p.getTotal(),p.getResult());
    }
    @Override
    public Orders getOrderDetail(Long id) {
        return orderMapper.get(id);
    }
    @Override
    public void cancel(Long id){
        // 根据id查询订单
        Orders ordersDB = orderMapper.get(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    @Override
    @Transactional
    public void repetition(Long id) {
        //再来一单就是跳转到那个购物车页面所以只需要设置购物车就好了
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        log.info("历史订单分页查询");
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = (Page<Orders>) orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }
    @Override
    public OrderVO details(Long id){
        return orderMapper.details(id);
    }
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.get(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款");
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orderMapper.update(orders);
    }
    @Override
    public void cancelByAdmin(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.get(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.get(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.get(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    @Override
    public void reminder(Long id) {
        //通过id查出订单号
        Orders orders = orderMapper.get(id);
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //用户催单 实际上是用户告诉服务器端 服务器端发送消息给管理端
        Map map=new HashMap<>();
        map.put("type",2);//前端接收这些参数分辨到底是催单还是有用户下单
        map.put("orderId",orders.getId());
        map.put("content","用户催单了订单号为"+orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
